Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 22 for “"Flight control systems"”.
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Robust adaptive flight control systems in the presence of time delay
Adaptive control technology is a promising candidate to deliver high performance in aircraft systems in the presence of uncertainties. Currently, there is a lack of robustness guarantees against time delay with the difficulty arising from the fact that the underlying problem is nonlinear and time …
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Fidelity of flight control systems in a real-time optimal trajectory planner
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1991.
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Intelligent Flight Control Systems Using Adaptive Deep Neural Networks and Concurrent Learning-Based Design Methods
… deep neural network (DNN)-based adaptive control strategies for unmanned aerial vehicles (UAVs) operating under aerodynamic uncertainty and complex actuator dynamics.</p> <p>The first contribution presents a control strategy employing a concurrent learning (CL)-based DNN training …
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Adaptive control of Unmanned Aerial Systems
Adaptive control is considered to be one of the key enabling technologies for future high-performance, safety-critical systems such as air-breathing hypersonic vehicles. Adaptive flight control systems offer improved performance and increased robustness to uncertainties by virtue of their ability …
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Relational specification as a testing oracle
… test oracles. The rise of use of computers in control safety critical systems, i.e., flight control systems, necessitates that rigorous system testing is performed before the deployment. In flight control systems, requirements are mostly concerned with the safety and maneuverability of an …
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System Design Methodology and Implementation of Micro Aerial Vehicles
… process of micro aerial vehicle (MAV) systems, which are suitable for indoor missions such as search and rescue, and surveillance. The proposed MAVs seek a breakthrough in the current unmanned aircraft market, by having the ability of full mission autonomous control, from waypoints …
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Fault Tolerant Flight Control: An Application of the Fully Connected Cascade Neural Network
… in the presence of failures by utilising flight control systems that are tolerant to failures. Such systems are known as fault tolerant flight control systems (FTFCS). FTFCS can be implemented by developing failure detection, identification and accommodation (FDIA) schemes. Two of the …
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Information fusion schemes for real time risk assessment in adaptive control systems
Intelligent Flight Control System (IFCS) deploys a neural network for in-flight aircraft failure accommodation. Verification and validation (V&V) of adaptive systems is a challenging research problem. Our approach to V&V relies on real-time monitoring of neural network learning. Monitors detect …
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Managing embedded software development in China
… a computer to make the product more flexible and controllable. For example, a modem washing machine has a control software system to execute different "washing programs" for different types of clothes. Embedded systems usually have strict requirements on response time, and the response must be …
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Performance and Robustness Assessment for a Robust Port-Hamiltonian Flight Controller
… conducting research in the field of nonlinear control of unmanned air vehicles are constantly searching to improve robustness and performance of flight control systems through new control laws. A control law can be designed to provide robustness guarantees due to the structure of the aircraft …
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Fault tolerant control for nonlinear aircraft based on feedback linearization
The thesis concerns the fault tolerant flight control (FTFC) problem for nonlinear aircraft by making use of analytical redundancy. Considering initially fault-free flight, the feedback linearization theory plays an important role to provide a baseline control approach for de-coupling and …
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Design of Flight Control Laws for a Novel Stratospheric Dual-Aircraft Platform
… that features two glider-like unmanned aerial systems (UAS) tethered via a thin adjustable cable allowing them to sail back-and-forth, without propulsion, using vertical wind shear. DAP offers the potential of a low-cost atmospheric satellite. This thesis presents the results of an initiative …
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Modeling and flight testing of differential thrust and thrust vectoring on a small UAV
… differential thrust, and thrust vectored flight configurations, and verify this modeling through simulation and flight testing experiments. This thesis outlines the modeling process, simulator development, design, and implementation of a propulsion assisted control system for the WVU …
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Robust Nonlinear Estimation and Control Applications using Synthetic Jet Actuators
… known as utter, cause significant challenges in flight control of small unmanned aerial vehicles (SUAVs), and could potentially lead to structural damage and catastrophic failures. LCO can be described as vibrational motions in the rocking, pitching and plunging displacements of an aircraft wing. …
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ENABLING THE TEST AND EVALUATION OF AUTONOMOUS FUNCTIONS THROUGH STANDARDIZATION OF UAS INTEGRATION
Autonomous capabilities for uncrewed aerial systems (UAS) have advanced rapidly in recent years; however, the transition of autonomous functionality from laboratory environments toreal-world flight testing remains limited by regulatory constraints, hardware compatibility challenges, and the absence …
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OnBoard Parameter Identification for a Small UAV
One of the main research focus areas of the WVU Flight Control Systems Laboratory (FCSL) is the increase of flight safety through the implementation of fault tolerant control laws. For some fault tolerant flight control approaches with adaptive control laws, the availability of accurate post …
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Formalization of flight mechanical CS-25 requirements for assessments using flight simulation in preliminary aircraft design
… design departments to create high-fidelity flight simulation models integrated with flight control systems. These models are then used to simulate flight tasks, assessing the impact of design decisions on the aircraft's flight mechanics, and ensuring compliance with the certification …
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Wind and Wake Sensing with UAV Formation Flight: System Development and Flight Testing
… system for high wind encounters, and enhanced control for small UAVs during flight. On the other hand, the existence of wind can be advantageous since it can lead to fuel savings and longer duration flights through dynamic soaring or thermal soaring.;Wakes are an effect of the lift distribution …
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Verifiable Adaptive Control Solutions for Flight Control Applications
… fundamental theoretical problems relevant to flight control for aerial vehicles and weapons in highly uncertain dynamical environment. The approach taken in this dissertation is the L1 adaptive control, which is elaborated from its design perspective for output feedback solution and is …
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Robust Control Design and Analysis for Small Fixed-Wing Unmanned Aircraft Systems Using Integral Quadratic Constraints
… of this work are applications of robust control and analysis methods to complex engineering systems, namely, small fixed-wing unmanned aircraft systems (UAS). Multiple path-following controllers for a small fixed-wing Telemaster UAS are presented, including a linear parameter-varying …
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